Comment 23 for bug 1737033

I tested a kernel without the following commits from https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1728739 and I was able to mount the CephFS filesystem successfully:

http://kernel.ubuntu.com/git/ubuntu/ubuntu-xenial.git/commit/?id=f14ca6ac3b198f30ee138f02c3c7d380d165736e

http://kernel.ubuntu.com/git/ubuntu/ubuntu-xenial.git/commit/?id=09ade67fc6224440719a94e8c8add556eb036437

http://kernel.ubuntu.com/git/ubuntu/ubuntu-xenial.git/commit/?id=c043f509409e380281403f66c54794efbd5d0f02

http://kernel.ubuntu.com/git/ubuntu/ubuntu-xenial.git/commit/?id=74771960c7794994fd9067cdd8df0725b6ce75f6

http://kernel.ubuntu.com/git/ubuntu/ubuntu-xenial.git/commit/?id=5a03f3043cb617cf2cf5ec9cbd0685d0e86e8b0e

http://kernel.ubuntu.com/git/ubuntu/ubuntu-xenial.git/commit/?id=75ee940e71ed7841958cace371a5c79076a0378c

I spoke to the kernel team and their plan is to revert and re-upload (likely next week) to restore functionality.